Android GPS Location with Listener

/****
 * GPS Process
 * 
 * First of all call listener of Location
 * then checking for GPS_PROVIDER
 * if not available then check for NETWORK_PROVIDER
 * and if its also not available then pass 0.00,0.00 to longitude and latitude
 *   
 ****
 */
/** PROCESS for Get Longitude and Latitude **/
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

// Define a listener that responds to location updates
locationListener = new LocationListener() {
	public void onLocationChanged(Location location) {
		// Called when a new location is found by the network location provider.
		longitude = String.valueOf(location.getLongitude());
		latitude = String.valueOf(location.getLatitude());
		Log.d(TAG, "changed Loc : " + longitude + ":" + latitude);
	}

	public void onStatusChanged(String provider, int status, Bundle extras) {
	}

	public void onProviderEnabled(String provider) {
	}

	public void onProviderDisabled(String provider) {
	}
};

// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

// check if GPS enabled
if (isGPSEnabled) {

	Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

	if (location != null) {
		longitude = String.valueOf(location.getLongitude());
		latitude = String.valueOf(location.getLatitude());
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
	} else {
		location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

		if (location != null) {
			longitude = String.valueOf(location.getLongitude());
			latitude = String.valueOf(location.getLatitude());
			locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
		} else {
			longitude = "0.00";
			latitude = "0.00";
		}
	}
}
// see http://androidsnippets.com/android-gps-location-with-listener